M0502-3-B-5,METRIC ROUND SPACERNICKEL 4.5MM
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【RAF Electronic Hardware】M0502-3-SS,电路板硬件 - PCB 3mm, 3.2 ID,, M3 ROUND METRIC SPACER
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【RAF Electronic Hardware】M0503-25-AL,电路板硬件 - PCB 4mm, 2.7 ID, M2.5 ROUND METRIC SPACER